Davies Liu created SPARK-8680:
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Summary: PropagateTypes is very slow when there are lots of columns
Key: SPARK-8680
URL: https://issues.apache.org/jira/browse/SPARK-8680
Project: Spark
Issue Type: Bug
Affects Versions: 1.4.0, 1.3.1
Reporter: Davies Liu
The time for PropagateTypes is O(N*N), N is the number of columns, which is
very slow if there many columns (>1000)
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